Cisco 6500 - Manual (Page 48)

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Cisco IOS Software Configuration Guide, Release 12.2SX
OL-13013-06
Chapter 4 Configuring Virtual Switching Systems
Configuring a VSS
Router (config-vs-domain)# dual-active detection bfd
Router (config-vs-domain)# dual-active pair interface g 1/9/48 interface g 2/1/48 bfd
adding a static route 200.230.230.0 255.255.255.0 Gi2/1/48 for this dual-active pair
adding a static route 201.230.230.0 255.255.255.0 Gi1/9/48 for this dual-active pair
Router(config-vs-domain)# exit
Router(config)# exit
Router# show switch virtual dual-active bfd
Bfd dual-active detection enabled: Yes
Bfd dual-active interface pairs configured:
interface1 Gi1/9/48 interface2 Gi2/1/48
Configuring Fast Hello Dual-Active Detection
Fast hello dual-active detection is enabled by default; however, you must configure dual-active interface
pairs to act as fast hello dual-active messaging links.
To configure fast hello dual-active detection, perform this task:
When you configure fast hello dual-active interface pairs, note the following information:
• You can configure a maximum of four interfaces on each chassis to connect with the other chassis
in dual-active interface pairs.
• Each interface must be directly connected to the other chassis and must not be a VSL link. We
recommend using links from a switching module not used by the VSL.
• Each interface must be a physical port. Logical ports such as an SVI are not supported.
• Configuring fast hello dual-active mode will automatically remove all existing configuration from
the interface and will restrict the interface to fast hello dual-active configuration commands.
• Unidirectional link detection (UDLD) will be disabled on fast hello dual-active interface pairs.
This example shows how to configure an interface for fast hello dual-active detection:
Router(config)# switch virtual domain 255
Router(config-vs-domain)# dual-active detection fast-hello
Router(config-vs-domain)# exit
Router(config)# interface fastethernet 1/2/40
Router(config-if)# dual-active fast-hello
Command Purpose
Step 1 Router(config)# switch virtual domain domain_id Enters the virtual switch submode.
Step 2 Router(config-vs-domain)# dual-active detection
fast-hello
Enables the fast hello dual-active detection method.
Fast hello dual-active detection is enabled by default.
Step 3 Router(config-vs-domain)# exit Exits virtual switch submode.
Step 4 Router(config)# interface type 1 switch/slot/port
1. type = fastethernet, gigabitethernet, or tengigabitethernet
Selects the interface to configure. This interface must
be directly connected to the other chassis and must
not be a VSL link.
Step 5 Router(config-if)# dual-active fast-hello Enables fast hello dual-active detection on the
interface, automatically removes all other
configuration from the interface, and restricts the
interface to dual-active configuration commands.
Step 6 Router(config-if)# no shutdown Activates the interface.